Cyanid-gas fumigating apparatus.



P. F. MURPHY.

. CYAN ID GAS FUMIGATING APPARATUS.

APPLICATION FILED APR..27| 1916.

Patented Feb. 20, 1917.

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PETER FRANCIS MURPHY, F NEW ORLEANS, LOUISIANA;

I Specification of Letters Patent.

cram -ens FUMIGATING APPARATUS.

.lPatented. Feb. 20, 1917.

Application filed April 27, 1916. Serial No. 93,908.

To aZZ whom it may concern: 1

Be it known that I, PETER FRANcIs MUR- PI-IY, M. D., a citizen of the United States,

' peditiously carried on, with the paring the gas,

residing at New Orleans, in the parish of Orleans and State of Louisiana, have in-.

vented certain new and useful Improvements in Cyanid-Gas' Fumigating Apparatus, of which the following is a specification.

This invention, relates to an improvement in cyanid gasfumigating apparatus, and has particular reference to such a device whereby fumigation may be conveniently and exminimum danger. v

An important object of the invention is to provide a device of the above mentioned character, whereby the different chemicals employed in the preparation ofthe fumigating gas are completely confined during the generation of the gas, thereby reducing the danger, usually incurred bya' person in preand such device being at all times under the complete control of the op erator.

Other objects and advantages of the inven tion will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals designate like parts throughout the same, 7

Figure 1V is a side elevation bodying my invention,

Flg. 2 is a verticalsection taken on line 2-2 of Fig. 1, and,

. Fig. 3 is a transverse section taken on line 3-3 of Fig. 1.

Referring to shown a preferred embodiment of my invention, the numeral 5 designates a mixing chamber. The upper endor top of this mixing chamber is provided with a relatively large preferably circular opening 6, through which sulfuric acid is admitted-to the mixing chamber. Bolted or otherwise securely fastened tof-thetop of the mixing chamber 5 and surrounding the opening 6 is a ring 7,

provided with interior screw-threads, for a purpose to be described. Packing 8 is. interposed between the top of'the chamber and the ring 7, to insure an air-tight joint therebetween. I

Screw-threaded within the ring 7 is a nipprovided With'a' cutoff valve 24. 1 of a devlceemfly valve is then turned the drawings, wherein is tween'the mixing chamber placed upon the tube 9.

' fall within ple Tor filling tube 9. This filling tube is screw-threaded at its upper end and receives thereon a detachable cap 10. This cap 10 has handlesv 11, for the purpose of rotating the same upon the tube 9; The cap 10, is provided centrally thereof with an opening 12, receiving a take-0E pipe 13. Any suitable union may be had between the pipe 13 and the cap 10, as is obvious.

Located within and near the lower end of the tube 9 is a butter-fly or I substantially the same diameter as the tube 9. This butter-fly valve is securely fixed to a'rock-shaft 16, journaled through bearings 17, preferably formed integral with the tube These bearings 17 arein the form of stufling boxes and insure an air-tight joint. At one of its outer ends, the shaft 16 is bent at a right angle, to provide a crank 18, for

the purpose of rotating the butter-fly valve.

Alatch or hook 19 is pivoted to the side of the tube 9, as shown at 20, and is adapted to engage the crank 18 when in the vertical po- -crank.18,- when in the hOIlZOIllifil. position.

A take-off pipe 23 is located a'diacent the bottom of the'tank 5, for the purpose of draining the same. This take-off;

In the use'of the apparatus, when it is desiredto form a gasfor the purpose of fumigating, the cap 10 is removed. The butterto the vertical position, asshown in Fig. 2,

fpoured'through the tube "9 into'the' mixing depth. The but to the closed po-' chamber 5, to the desired tor-fly valve. is then turned sition, thereby cutting off communication be- 5 and the tube 9. Sodium cyanid is then placed upon the butter-fiy valve 15 and the cap 10 is again rethen turned tofallow the sodium cyanid to the chamber 5 with the sulfuric acid, the same forming a hydrocyan-ic acid gas. As the gas'forms, it is-tal'ren off through the take-off pipe'13, to the place desired to be fumigated.

lit is to be understood that the form of my invention herewith shown and described is and thereby mix.

disk valve 15, of

pipe is and sulfuric acid is The valve 15 is to be taken as a preferred example of the 1 same, and that various changes in the shape, size, and-arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the sub- 1'. In gas generating apparatus, a mixing chamber provided in its top with. an openchamber, a dram pipe connected with the lower end of said chamber, an opening formed in the upper end of the mixing chamber, a ring secured to the top of the mixing chamber and completely surrounding the opening, packing arranged between the mg, a tube connectedwith the upper en ofQrlTJg-and the top of the mixing chamber, a

" the mixing chamber and arranged -in proximity to the opening, means located within the lower end of said tube to cover and, uncoverthe opening, and a removable cap carried by the upper end of the tube.

2-. In gas generatingapparatus, a'mi xing chamber, an opening formed within its up per end,-a ring carried by the upper end of the mixing chamber and surrounding the opening,'a tubeconnected with said ring, a

butter-fly valve located within said tube, and adapted to "completely -close the same, a

.crankcarried by the butter-fly valve, a latch tohold the crank in the vertical position, a

latch to hold the crank in the horizontal po- 1 sitioii, a detachable cap having screw-threadtube located above the mixing chamber and having screw-threaded engagement within the ring, a transverse shaft arranged near the lower end of the tube, stufiing boxes receiving the shaft, a butter-fly valve carried by the shaft, a crank formed upon one end of thesh'aft to turn the butter-fly valve,-

means to hold the crank against improper movement, a cap having screw-threaded engagement' with the upper end of the tube, and a take-oil pipe carried by the cap.

PETER rmrcis MURPHY, M. 1).

copies of this patent may becbtained tor fi've cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

